package cn.tedu.knows.auth.service;

import cn.tedu.knows.commons.model.Permission;
import cn.tedu.knows.commons.model.Role;
import cn.tedu.knows.commons.model.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@Component
public class UserDetailsServiceImpl implements UserDetailsService {

    @Resource
    private RestTemplate restTemplate;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        //获得用户信息并判断是否存在
        String url = "http://sys-service/v1/auth/user?username={1}";

        User user = restTemplate.getForObject(url,User.class,username);

        if (user==null){
            throw new UsernameNotFoundException("用户名不存在");
        }
        //根据用户id查询所有权限和所有角色
        url = "http://sys-service/v1/auth/permissions?id={1}";
        //当我们Ribbon请求的服务器返回List类型时
        //要使用List的泛型数组来接收返回值
        Permission[] permissions = restTemplate.getForObject(
                url,Permission[].class,user.getId());
        url = "http://sys-service/v1/auth/roles?id={1}";
        Role[] roles = restTemplate.getForObject(
                url,Role[].class,user.getId());
        //定义包含所有角色和权限的数组
        String[] auth = new String[permissions.length+roles.length];
        int i=0;
        for (Permission p: permissions){
            auth[i++] = p.getName();
        }
        for (Role r : roles){
            auth[i++] = r.getName();
        }
        //构建UserDetails对象
        UserDetails u = org.springframework.security.core.userdetails.User
                .builder()
                .username(user.getUsername())
                .password(user.getPassword())
                .authorities(auth)
                .accountLocked(user.getLocked()==1)
                .disabled(user.getEnabled()==0)
                .build();

        return u;
    }
}
